/Engine/Source/Runtime/Engine/Classes/Engine/GameViewportClient.h
Pixel size of the deadzone for all sides (right/left/top/bottom) based on which local player it is
true if the safe zone exists
bool CalculateDeadZoneForAllSides ( [ULocalPlayer](API\Runtime\Engine\Engine\ULocalPlayer) * LPlayer, [UCanvas](API\Runtime\Engine\Engine\UCanvas) * Canvas, float & fTopSafeZone, float & fBottomSafeZone, float & fLeftSafeZone, float & fRightSafeZone, bool bUseMaxPercent )